How long does it usually take your doctor to get back to you when you call in with an issue?

Reason I ask: I had a scope 16 days ago and was told pathology results would only take a couple days.... I emailed through our online health portal early last week to follow up, allowed a couple business days for response and didn't get one. Finally a put in an urgent call to the nurse first thing Friday and didn't get a call back. I'm getting really frustrated because I've been having inflammation in my pouch and 8 months pregnant. Saw my OB this week and I have barely gained weight and my baby is measuring really small - I really need to get symptoms under control so I can so some serious weight gain this last month. Should I bug the emergency on-call doctor?